[GitHub] [tomcat] y987425112 commented on issue #145: Adding volatile keywords to member variables

[GitBox]

y987425112 commented on issue #145: Adding volatile keywords to member variables
URL: https://github.com/apache/tomcat/pull/145#issuecomment-470488862
 
 
   ```
   package com.ydy.thread.volatile2;
   
   public class VolatileTest {
        public static void main(String[] args) throws Exception {
                Task task=new Task();
                task.start();
                Thread.sleep(2000);
   ```
                
                task.setFlag(false);
                System.out.println("task.setFlag(true)");
                
        }
        
   
        private static class Task extends Thread{
                private    boolean  flag=true;
                private int num=0;
   
                @Override
                public void run() {
                        // TODO Auto-generated method stub
                        while(getFlag()) {
                                num     ++;
                        }
                        
                }
                
                private  boolean getFlag() {
                    return flag;
                }
   
                public synchronized void setFlag(boolean flag) {
                        this.flag = flag;
                }
                
                
        }
   }
   
   Dead cycle

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org


With regards,
Apache Git Services

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org
For additional commands, e-mail: dev-h...@tomcat.apache.org